连接USB设备后如何接收通知？ [英] How might I receive notifications when a USB device is connected?

问题描述

我正在编写一个程序来监视特定的设备。此设备可能或可能不始终处于连接状态，并且在连接时可以连接到多个不同端口中的任何一个。我希望我的程序能够妥善处理此问题。

I'm writing a program to monitor a specific device. This device may or may not always be connected, and when connected may be connected to any one of several different ports; I'd like my program to handle this gracefully.

是否有一种方法可以在连接特定的USB设备时接收通知，并从那里确定它是哪个端口

Is there a way to receive notifications when a specific USB device is connected, and from there to determine which port it is connected to?

推荐答案

要获取有关任何硬件设备已更改的信息，可以在主表单中添加以下代码：

To get an information if any hardware device has changed you can add the following code to your main form:

/// <summary>
/// Windows Messages
/// Defined in winuser.h from Windows SDK v6.1
/// Documentation pulled from MSDN.
/// For more look at: http://www.pinvoke.net/default.aspx/Enums/WindowsMessages.html
/// </summary>
public enum WM : uint
{
    /// <summary>
    /// Notifies an application of a change to the hardware configuration of a device or the computer.
    /// </summary>
    DEVICECHANGE = 0x0219,
}

protected override void WndProc(ref Message m)
{
    switch ((WM)m.Msg)
    {
        case WM.DEVICECHANGE:
            //ToDo: put your code here.
            break;
    }
    base.WndProc(ref m);
}

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